Improvement in steam-engines



J. R. MAXWELTEL EZRA COPE.

Improvement in Steam Engines.

No, 123, 35 Patented Feb. 13, 18 7-2. I

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' steam-cylinder.

uirr STATES-{PATENT-TQFFIGE JAMES R. MAXWELL, OF CINCINNATI, OHIO, Ann In zitA corn, on oo'v'rne. TON, KENTUCKY;

IMPROVEMENT lN STEAM-ENGINES.

Specification forming part of Letters Patent No. 123,635, dated February13, 1872.

To all whom wt may concern:

Be it known that we, JAMEs R. MAXWELL, of Cincinnati, in the county ofHamilton. and the State of Ohio, and EZRA Corn, of Govington, in thecounty of Kenton and State of Kentucky, have invented a new and usefulcast in one piece with its bed, affording two crank-shaft bearings atone end and a combined connecting piece and cross-head guides at theopposite end. Customary steam and exhaust ports and passages of aslide-valve engine are formed in and lead from a raised valve-seat castat the same time on the steamcylinder. The inner cylinder-head with itsstuffing-box is fitted and secured within the The other cylinder-head issecured in the usual manner to the opposite end of the steam-cylinder. Band B represent a cross-head formed in two sections. As requisite toinsert and adjust the cross-head, when fitted to be bolted togetherbetween the guide-ways, each section of the cross-head is a counterpartof and substitute for the other, and has one slide and one socket-hub orpiston-rod boss. The cross-head is bored out transversely to receive thejournal L. 1

In Fig. 3, B and B represent the cross-head in transverse section, withthe journal L neatly fitted therein to have a motion in its been ingwhen the connecting-rods M and M are secured on the protruding ends ofthe journal L by pins or otherwise, and connected up in operativecondition. The cross-head is turned off to conform to the guide-ways,which are fitted for the cross-head by boring at one set-' ting to borethe steam-cylinder.

Fig. 5 represents the valve-seat raised to admit the play of theindented finger Gr within. the enlarged exhaust-passage, and to en gagewith and throw the valve H within the? steam-chest.

In Figs. 2 and 6, N represents a sleeve bolt-3 ed to the side of theexhaust-passage to form; a bearing for the rocker-shaft, as shown inFigs. 2, 4, and 6. The indented finger'Gr is preferably formed on oneend of the rockershaft. On the oppsite end of the rocker-shaft issecured the arm F, with a curved slot to serve in adjustments of thevalve-gear.

In Figs. 1 and 2, O and 0 represent a crankshaft sustained in twobearings, and having two journals for the main connecting-rods M and Mbetween the two bearings, with a balance-wheel on one end and aneccentric or crank on the opposite end .to impart proper motion throughthe connecting-rod E to the valve H when all the parts are connected up.and adjusted ready for the admission of steam into the steam-chest inthe usual manner, and thus initiate the movement of the relating partsas combined and arranged to successful operation for the varied uses andpurposes of such enginery, but more especially suited as. a motor forany piston or plunger-pump bolted to the flanged end of the connectingpiece, with the piston-rod of the pump attached to the cross-head.

Having thus fully described the manner of making and using ourinvention, what we desire to claim, and secureby Letters Patent,

1. We claim the cross-head of a steam-engine, when constructed, asshown, of two pieces bolted together, each piece provided with oneslide, one hub or piston-rod boss, and part of the bearin g for thepitman-journal, all formed in the casting for the purpose as described.

2. The arrangement of the crosshead guides fixerf asunder in thecasting, the crossa structed and operating substantially as shown.

and described.

3. We also claim the slide-valve H, incombination with the sleeve N andfinger G, the

arm F,, connecting-red E, and the eccentric orcra-nk D on the shaft 0,.'all constructed and operating substantially as shown and described, forthe purpose herein set forth.

JAMES R. MAXWELL. EZRA COPE. Witnesses:-

N. MARGHANT, JOSEPH MosEs.

